In addition to detecting AC/DC EMF & Temperature changes in the environment, this New feature also uses a mini telescopic antenna to radiate its own independent magnetic Field around the instrument. This EM field can be easily influenced by materials and objects that conduct electricity. Based on source proximity, strength and EM field distortion...(4) Multi-Colored LED lights can be activated in any order or combination. This new feature is intended to further help promote and advance Paranormal research.As seen on Ghost Adventures

As of 11/29/16, The Mel-8704R-REM now features a 5-step high power adjustable magnetic field, similar to the Mel-8704R-REM-EMT which has been discontinued. The device uses a mini telescopic antenna to radiate the field around the device. This magnetic field can be easily influenced by
materials and objects that conduct electricity. Based on source
proximity, strength and EM field distortion, (6) Multi-Colored LED
lights can be activated in any order or combination. Each LED will also correlate to the sensitivity level when the magnetic field is adjusted by the user using the REM RANGE button on the right side of the device:

Glow in The Dark Push Buttons - Must be charged under a bright light for 5 minutes prior to use

Includes: (1) 9Vdc Alkaline battery

Includes: (1) Deluxe carrying case

What makes the
Mel-8704R-REM Model so uniquely different from all other EMF meters is
that in addition to detecting AC/DC EMF fluctuations and Ambient
temperature changes, it has a special REM feature. REM stands for
Radiating EM Field. When the circuit is activated, an independent
discreet EM field is created around a mini telescopic antenna. See
Illustration A.

llustration A

This EM field can ONLY
be influenced by materials and objects with high electron
mobility (many free electrons) in other words conductive properties.
Conductivity is determined by the types of atoms in a material. Based on
Conductive source, proximity & strength, the EM field can be easily
changed causing some field distortion. When this happens, there are (4)
colorful LED lights and Sound that will activate. The visual and
audible response is proportional and correlates directly to the REM
field disturbance. The stronger the influence on the REM field, the
more intense the LED's and Sound response. This new feature is immune
to Radio Waves, AC/DC EMF and other influences that may lead to a false
positive response. For best results, Place the device on a
non-conductive surface when conducting your communication sessions. The
Mel-REM can also be used as a hand held device, but careful attention
should be made to keep hand and fingers toward the bottom of the
instrument. This instrument is intended to further help promote and
advance Paranormal research.